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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 26 hours after estrus begins






2. 30 hours after estrus begins






3. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






4. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






5. Why does estrus happen before ovulation?






6. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






7. 30 hours after estrus begins






8. What makes the milk flow through the mammary glands?






9. Sperm production






10. Important 'landmark' during palpation






11. The more stressed out the male is - the less sperm he is going to produce






12. Check feet and legs - look for masculine traits in build such as crest and muscling






13. Superior genes are _______ to multiply






14. 1. brain function - 2. blood flow - 3. willing female






15. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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16. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






17. Scar tissue plugs up chambers of udder






18. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






19. 1. brain function - 2. blood flow - 3. willing female






20. Look for infection - split - and rupture of the penis






21. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






22. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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23. Days which have increasing daylight hours

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24. Can survive ~7 days in cow. vast majority <48 hours






25. To remove/separate testicles from animal's body before animal reaches puberty






26. Contains and regulates the temp of the testes for sperm production






27. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






28. 114 days






29. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






30. Days which have decreasing daylight hours

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31. FEED






32. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






33. Animals which have only one estrous cycle (ex: dog - fox)






34. 30-38 hours after estrus cycle begins






35. (male) pushes the testes upward toward the body for warmth or protection






36. 147 days






37. 16-20 hours






38. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






39. (FSH) causes egg to mature in females






40. 45-60 days after breeding; re-breed as required






41. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






42. FEED






43. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






44. Luteolysis happens because of the ____________ hormone






45. Produce testosterone. located between the seminiferous tubules






46. Depository for semen during insemination. where urine leaves the body






47. (male) pushes the testes outward toward the legs for a cool-down off of the body






48. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






49. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






50. 147 days